Lawn Lake Dam

[1] Over the years the road that had been cut to permit construction of the dam fell into disrepair and ceased to exist.

[3] When the dam failed the waters rushed down the Roaring River valley, which falls 2,500 feet (760 m) in 6 miles (9.7 km), at a peak rate of 18,000 cu ft/s (510 m3/s), scouring a large gully out of the mountain stream and killing one person camping alongside it.

When the waters reached the broader valley of Fall River at Horseshoe Park they spread out and slowed, leaving behind a large alluvial fan of debris.

The flood continued down Fall River and hit the Cascade Dam which stored water to run a hydroelectric plant about a mile (2 km) downstream.

The Aspenglen campground was destroyed and two campers who returned to recover camping gear lost their lives, due to insufficient warning from park rangers.

The flood caused by the failure of Lawn Lake Dam scoured Roaring River valley and deposited an alluvial fan of debris in Horseshoe Park .
The mouth of Lawn Lake (the site of the dam) in July 2007, 25 years after the accident.
Lawn Lake in 2007, 25 years after the accident, with the shore still showing the former extent of the lake.